Mass murderer Stephen Paddock was prescribed anti-anxiety medication this past summer, a report said.

The gunman purchased 50 10-milligram tablets of diazepam — better known under its brand name Valium — on June 21, the Las Vegas Review-Journal reported, citing records from the Nevada Prescription Monitoring Program.

The prescription was from Henderson physician Dr. Steven Winkler, and his office declined to make him available for comment.

Paddock purchased the drug, without insurance, from a Walgreens in Reno.

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